28210887 has 6 divisors (see below), whose sum is σ = 40749072. Its totient is φ = 18807252.

The previous prime is 28210867. The next prime is 28210907. The reversal of 28210887 is 78801282.

It is an interprime number because it is at equal distance from previous prime (28210867) and next prime (28210907).

It is not a de Polignac number, because 28210887 - 2¹⁴ = 28194503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28210817) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1567263 + ... + 1567280.

It is an arithmetic number, because the mean of its divisors is an integer number (6791512).

Almost surely, 2^28210887 is an apocalyptic number.

28210887 is a deficient number, since it is larger than the sum of its proper divisors (12538185).

28210887 is a wasteful number, since it uses less digits than its factorization.

28210887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3134549 (or 3134546 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The square root of 28210887 is about 5311.3921903772. The cubic root of 28210887 is about 304.4193449579.

The spelling of 28210887 in words is "twenty-eight million, two hundred ten thousand, eight hundred eighty-seven".